| The BABAR detector at the PEP-II asymmetric-energy e+e- collider at the SLAC National Accelerator Laboratory collected a sample of (471.0 +/- 2.8) x 106 BB¯ pairs during its operation from 1999--2008. The study of the branching fractions and angular distributions of B meson decays to hadronic final states without a charm quark probes the dynamics of both the weak and strong interactions, and plays an important role both in understanding CP violation in the quark sector and in searching for evidence for physics beyond the standard model. We present branching fraction measurements for the decays B0 → rho0K* 0, B0 → f 0K*0, and B 0 → rho-K*+, where K* is a Kp* 0 or K*(892); we also measure B 0 → f0 K*2 (1430)0. For the K*(892) channels, we report longitudinal polarizations (for rho final states) and direct CP-violation asymmetries. We observe rho 0K*(892)0, rho0 Kp*0 0 , f0K*(892)0, and rho-K*(892)+ with greater than 5sigma significance, including systematics; f 0K*(892)0, rho- K*(892)+, and rho0 Kp*0 0 are observed here for the first time. We present first evidence for f0 Kp*0 0 with 3.0sigma and f0 K*2 (1430)0 with 4.4sigma significance. We place an upper limit on rho- Kp*+ 0 . We find results consistent with no direct CP violation. |
